a device made of clay, ceramic, plastic tubing or PVC, glass, a two liter coke bottles, or any other man made or fabricated substance that is normally filled with water to smoke fine and tasty nuggs of marijuanna with; can be of varying lengths and sizes

Bongs have been part of mainstream dope smoking for years and years now. This fabled and ultimatly cool object to look at has many variations and ways of loading.

'Backi Bong' or 'drop loader'
The Backi bong is a bong which doesnt have any gause.Instead, a pipe which the bowl has been removed, where you place a small amount of rolling tobacco to act as a temporary platform for the weed to sit on. This method is best done with normal plastic bongs and resin.

Gause Loader
A 'Gause Loader' or a 'water pipe' as it is legally known as, is your standard issue bong with a bowl. This is best with weed, as resin makes a mess of your gauses.

Bongs also come in a variation of diffrent shapes and sizes. The tube can range from 3 inches tall and half an inch wide, (micro bong) to the big ass cyprus hill style king arthurs that you see, boasting huge4/5 foot tall tubes and huge bubbles n pipes.

Ice bongs
Ice bongs are quite new to the stoner world, as they first started knocking around in the early 90s. The basic design principle of the ice bong that makes it diffrent is the twist in the tube, which is used to hold ice in the tube to cool smoke.

"Phil Givinchy Bong VIII" Rapzillars Bong

"KING ARTHUR" - Cyprus Hills Bong

"The Darkside"
"The Green Meanie" (other ridiculously named bongs that are knocking around.

A water pipe or bong is a device used for smoking, usually Cannabis (and less frequently tobacco or other substances), in which smoke is bubbled through a chamber containing water. The bong enables the operator to smoke in a manner very differently than is possible with a simple smoking pipe or joint (spliff). Most bongs are designed to either cool the smoke before it enters the operator's lungs, build up a large buffer of smoke which the user inhales quickly, or both. The word bong derives from the Thai word baung which refers to a cut off section of bamboo.

A bong is a specific type of water pipe. The body of the bong is the defining characteristic: the chamber is large, and placed over the mouth, a pipe stem is mounted hear the bottom, and bubbles through usually water to cool the smoke. The design originated in ancient SE Asia.
Bongs cool smoke, but also remove some THC.
Used bong water has a very bad smell similar to feline urine.